code: def __init__(self):
      self.scorer = BLEU()
  
file_path: NeMo/nemo/collections/nlp/metrics/prompt_learning_metrics.py
imports: from abc import ABC, abstractmethod
  import numpy
  import torch
  from rouge_score import rouge_scorer
  from sacrebleu import BLEU
label_desc: Use image node_id 1 to create a new BLEUScore object from inherited base classes: ValMetric with example: obj = BLEUScore()